by Opportunities for good samaritan cleanup of hard rock abandoned mine lands : oversight hearing before the Subcommittee on Energy and Mineral Resources of the Committee on Resources, U.S. House of Representatives, One Hundred Ninth Congress, second session, Thursday, July 13, 2006.

ISBN: 9780160778650ISBN: 0160778654Publication & Distribution: Washington . U.S. G.P.O. . For sale by the Supt. of Docs., U.S. G.P.O., (c)2006.

by based upon papers presented to the Fourth Joint CBA/DUA International Conference on the Rebirth of Towns in the West, AD 700-1050, held at the Museum of London on 21-23 March 1986 ; edited by Richard Hodges and Brian Hobley.